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Prestressed wire wrapping concrete pipe is manufactured in large rolls. A quality-control inspection requires 5 specimens from a roll to be tested for ultimate tensile strength (UTS). The UTS measurements (in 1000 psi) turned out to be 253, 261, 258, 255, 256.
a) Use these data to construct a 95% confidence interval estimate of the true mean UTS for a sample roll. What assumption you have assumed?
b) Calculate and interpret a 95% prediction interval for a new specimen selected at random from the roll.
The heights of 40 randomly selected people and the heights of their mothers are recorded. Statdisk is used to run a linear correlation and regression analysis. The partial results are provided below:
construct a frequency distribution table for these data. what type of graph would be appropriate to show the frequency distribution for these data?
a sample of 250 observations is selected from a normal population for which the population standard deviation is known
Elizabeth Bailey is the owner and general manager of Princess Brides, which provides a wedding planning service in Southwest Louisiana.
The mean and standard deviation for the quality point averages of a random sample of 36 college seniors are calculated to be 2.6 and 0.3
Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was u, = 30 with a = 5, and Sarah had a score of X - 45. On the Spanish exam, the mean was u, = 60 with 0 = 6 and Sarah had a score of X = 65. For which class must Sarah ..
Independent random samples taken on two university campuses revealed the following information concerning the average amount of money spent on textbooks during the fall semester.
What distinguishes regression from ANOVA? What are the assumptions and limitations of each, and when should one be used in place of the other
a time for the 100-meter spring of 15.1 seconds at a school where the mean time for the 100-meter sprint is 17.6
A standard deviation of 0.45 miles per gallon, find the probablilty that a car has a gas mileage of between 27.8 and 28.2 miles per gallon.
in 2006 merck released a vaccine named gardasil for hpv - the most common cause of cervical cancer among young women.
A suburban hotel derives its gross income from its hotel and restaurant operations. The owners are interested in the relationship between the number of rooms occupied on a nightly basis and the revenue per day in the restaurant.
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